APA aipamena

Macfarren, G. A., & Oxenford, J. (1864). Helvellyn: An opera in four acts. Cramer.

Chicago Style aipamena

Macfarren, G. A., and John Oxenford. Helvellyn: An Opera in Four Acts. London: Cramer, 1864.

MLA aipamena

Macfarren, G. A., and John Oxenford. Helvellyn: An Opera in Four Acts. Cramer, 1864.

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